"One of Fujibayashi's personal hobbies is cave diving -- together with other Nintendo staffers, he's part of an adventure club that explores underwater caves"
I can't wait to see Hidemaro Fujibayashi implement this in BOTW2. Never knew that there were real plans to make it happen in BOTW. I'll have to look into the water next time playing
Bringing back grottos and introducing underwater cave exploration can add so much more to the overworld, a lot of good ideas